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Comment Re:Additional information (Score 1) 44

Don't use motor oil; its dielectric strength is for shizzle. Get pharmaceutical grade white oil instead. There's no need for a filter in your system; rinse your equipment before dunking it and put a cover on your tank. Don't use a mechanical chiller; that's overkill, too expensive and too complicated. A single-loop dry cooler (basically a truck radiator with a box fan attached) will cool your oil well in 95% of the world. You want "hot" oil leaving your tank at about 60C and "cool" oil returning to your tank at about 35-40C.
  - Difficulty Level: I started one of the leading Immersion Cooling equipment suppliers.

Comment Re:"It just needs more technology!" (Score 1) 98

Well, you can. Rejecting heat through evaporation is the cheapest and easiest, since water has a much higher heat capacity than, say, air. But with more energy you can blow more air around and accomplish the same thing. Just check out the article: "He also claimed that most new facilities use no water for cooling."

Cooling by direct immersion in dielectric fluid doesn't use any water; it goes straight to an air/liquid heat exchanger.

Comment They're moving to Paraguay (Score 1) 34

I'm Engineered Fluids, manufacturer of the Immersion Cooling system. The owners of this DC are a church that got a big windfall donation a couple of years ago and invested it all in BitCoin mining. They're now picking up and moving to Paraguay, where I hear that they got a better deal on electricity in the Foz de Iguaçu region.

Comment Re:Some liquids are quite ecologically unfriendly (Score 2) 25

Not all dielectric heat transfer oils are fluorinated, and therefore as unfriendly to the ecology and to workers' health. The best are hydrocarbon based. I developed several different fluids that are being used in computer as well as other high powered electrical equipment (RF transmission, MRI equipment, high torque DC automotive motors, etc.) OptiCool Fluid by DSI Ventures, Inc., is one of these - it's more than 98% biodegradable in standard tests, nontoxic, nonhazardous and does not deplete the ozone layer like fluorinated fluids do. It's extremely stable and has good material compatibility. Plus, it's about 5 - 10% of the cost of fluorinated fluids.

Comment a different perspective (Score 5, Interesting) 687

I live in Brazil, where booth babes are a fixture at any trade show. My daughter has been one of them. She's in college, speaks three languages and looks fantastic in a short, tight dress. She gets paid several hundred dollars a night to engage prospective customers outside the booth and qualify them as to whether to bring them into the booths for the salespeople to work them over. Speaking three languages, she's in demand for this job - she's tired at the end of a show, but it's good money and she meets interesting people. She's not a prostitute - she knows that she's being ogled, but she's worked hard on her looks and is proud of them. She gets propositioned occasionally, but she's a big girl and can handle herself. Next year, she'll graduate with a degree in Chemistry from University Federal do Rio de Janeiro, one of the best universities in Brazil, and will go into pharmaceutical research. She's not being degraded - she goes into her job with her eyes open and feels like this is a heck of a lot better than other jobs that she could get.

Jesus, I'm glad I don't live where people debate this shit endlessly.

Science

Fossil of Ant-Eating Dinosaur Discovered In China 64

thomst writes "Charles Q. Choi of LiveScience reports that a farmer in southern Henan Province in China has dug up the first known ant-eating dinosaur, a half-meter-long theropod (the dinosaur family to which T. Rex belongs), whose fossilized remains were described as 'fairly intact'. The 83- to 89-million-year-old pygmy dinosaur has been named named Xixianykus zhangi by Xig Xu, De-you Wang, Corwin Sullivan, David Hone, Feng-lu Han, Rong-hao Yan, and Fu-ming Du, whose paper on the critter, A basal parvicursorine (Theropoda: Alvarezsauridae) from the Upper Cretaceous of China, was published in the March 29 issue of Zootaxa (the abstract is available in PDF format for free, the full article is paywall-protected.)"
Medicine

Child Receives Trachea Grown From Own Stem Cells 103

kkleiner writes "Doctors at the Great Ormond Street Hospital (GOSH) along with colleagues at the University College London, the Royal Free Hospital, and Careggi University Hospital in Florence have successfully transplanted a trachea into a 10 year old boy using his own stem cells. A donor trachea was taken, stripped of its cells into a collagen-like scaffold, and then infused with the boy's stem cells. The trachea was surgically placed into the boy and allowed to develop in place. Because his own cells were used, there was little to no risk of rejection. This was the first time a child had received such a stem cell augmented transplant and the first time that a complete trachea had been used."

Comment Re:That's what you get (Score 1) 940

No - you're wrong (and how the heck did you get modded as "insightful"?).. I don't get uncomfortable because there are more fat people in the US. I do hate to sit next to some cow - even if he/she is what would be called "normal" in the midwest these days - on an airline. I'm not asking for first class armroom; I'm just asking that the person next to me doesn't spill over into my seat. I'm an older, big guy myself, but I'm fit, and I'd appreciate it if more people in the US made the effort, too.

And whaa, whaaa, whaaa, about being "bombarded" with unrealistic body images - if they had any real effect on the psyche of overweight people, then perhaps we overweight wouldn't be the new normal.

I live in South America and return frequently to the US. The first thing that I notice when I land in the US is how overweight people are. It's not that there aren't fat people in Brasil, Argentina and Chile; it's just that it's not the norm.

Comment Re:I'd like to see Apple make a move, but... (Score 0, Troll) 510

That may have been their goal - to market to people who are willing to pay more for a product that works better - but both of the Apple products that I've bought have not worked nearly as well as their competition. The PPC laptop I bought in 1992 crashed several times a day - I went back to Windows 98 for its stability! The iPhone that I have doesn't like the fact that I took it out of the US to use. It constantly complains. Its battery is weak and I can't even change the darn thing. My experience is that Apple products DON"T live up to their promise of 'just works'.

Comment why don't people do it themselves? (Score 1) 306

Here in Brasil, we have the "US model" of subsidized phones and contracts for the more expensive phones (cheaper phones don't have contracts, but are still subsidized - it's just that the service itself is so darned expensive that the carriers get paid back for the handset).

But I buy new, unlocked hardware on Ebay and bring it to Brasil, where it works fine. Why don't people in the US do that? Buy what you want and use it where you want it. Sure, you'll fork out $300 - $600 for a new smartphone, but it would quit all the bitching about being locked to AT&T, etc. Is it just laziness and inertia?

Comment try moving to another country (Score 1) 306

Try using your iPhone in a country where it wasn't originally sold. Then you'll see the value of jailbreaking - and learn what a pain the Apple lockdown process is. Every time I update the firmware, the thing tries to re-lock onto AT&T (the nearest AT&T tower is about 6000 miles away, I reckon). If I want American apps (I'm American), then I have to jailbreak the thing, or buy a shitload of iTunes cards when I'm in the states.

I like the phone's functionality, but I'm seriously considering buying another piece of hardware to get away from Apple's lockdown. Oh, and iTunes sucks on my computer.

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